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    <script>
        //  filter 筛选数组
         var arr1 = [12, 66, 4, 88, 3, 7];
         var newArr1 = arr1.filter(function (value, index) {
             return value >= 20;
         })
         console.log(newArr1);
         var arr2 = [12, 66, 4, 88, 3, 7, 12, 66, 88];
         var newArr2 = arr2.filter(function (value, index) {
             return value % 2 === 0;
         });
         console.log(newArr2)
    </script>
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